Can a person swallow food with his or her body upside down?

Can you swallow upside down?

When you swallow, the muscles behind the food contract automatically, pushing the food along the esophagus, and forcing it down into the stomach. This squeezing action is known as peristalsis. When you swallow, the small flap of tissue which you can see hanging down at the back of your throat when you look in a mirror, closes off the entrance to your windpipe. At the same time another flap closes the tube leading to your nose. So, yes, you could swallow upside down without choking.

From another web site:

Can we swallow if we are upside down?

Yes, you can swallow upside down because the muscles around the esophagus are strong enough to push the food up to your stomach. I do not, however, recommend you try this anytime soon.

Where does the food go when we swallow?

When we swallow the food goes into a tube called the esophagus. The esophagus is a muscular tube that is connected to the stomach. The muscles that surround the esophagus help to squeeze and push the food into the stomach.

A person can swallow food with his body upside down. Firstly we must understand the swallow process during which food passes through the oesophagus . The oesophagus is composed of strongh involuntary muscle which makes strong and rhythmic contraction to squeeze the food into the stomach. Therefore the swallow process does not depend on gravity. That is why the oesophagus can do the swallow process against the gravity, even though the body is upside down.
當一個人倒立時，仍然可以吞食物。首先我們要明白食物通過食道的程序。食道是由強力的不隨意肌組成的，這些肌肉有力而有節奏地收縮，將食物推進胃裡去，那麼，吞食物的程序並不是依靠地心吸力的原理，這解釋了為甚麼身體在倒立時，食道可以反地心吸力地，仍可進行吞吃程序。